Biology:Rauhocereus
| Rauhocereus | |
|---|---|
| |
| Rauhocereus riosaniensis in cultivation | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Tribe: | Cereeae |
| Subtribe: | Trichocereinae |
| Genus: | Rauhocereus Backeb.[2] |
| Species: | R. riosaniensis
|
| Binomial name | |
| Rauhocereus riosaniensis Backeb.[2]
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| Synonyms[3] | |
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Rauhocereus is a monotypic genus of cacti (family Cactaceae). Its only species is Rauhocereus riosaniensis,[2] which has nocturnal flowers.[4] It is known from northern Peru (Rio Santa, Rio Zana, Chamaya and Jaén).
Description
The mostly shrubby Rauhocereus riosaniensis, usually branching from the ground, often forms thickets up to 4 meters high. The upright, columnar shoots are bluish-green and have a diameter of 8 to 15 centimeters. The 5 to 6 ribs are broken up into many warts. 2 to 8 strong thorns, up to 5 centimeters long, emerge from the woolly areoles. The lower ones are initially reddish, the upper ones yellowish. Later all become greyish-white.
The bell-shaped flowers appear near the shoot tip. They open at night, are 8 to 10 centimeters long and have a diameter of up to 5 centimeters. The flower cup and the flower tube are covered with small scales and curly brown hairs.
The red, fleshy fruits are ovoid with a persistent flower rest. They contain small, ovoid, shiny black seeds.[5]
Taxonomy
The genus and its only species were first described in 1957 by Curt Backeberg.[2] (As of October 2023), Plants of the World Online accepted two subspecies:[3]
- Rauhocereus riosaniensis subsp. jaenensis (Rauh) Ostolaza
- Rauhocereus riosaniensis subsp. riosaniensis
Distribution
Rauhocereus riosaniensis is found in northern Peru in the Amazonas and Cajamarca regions at altitudes of 500 to 1000 meters.[citation needed]
References
- ↑ "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. 2011-05-07. https://www.iucnredlist.org/en. Retrieved 2023-08-19.
- ↑ 2.0 2.1 2.2 2.3 "Rauhocereus Backeb" (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/295613-2.
- ↑ 3.0 3.1 "Rauhocereus riosaniensis Backeb.." (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/217892-2.
- ↑ Marcelo-Peña, J. L.; Huamantupa, I.; Särkinen, T.; Tomazello, M. (2016). "IDENTIFYING CONSERVATION PRIORITY AREAS IN THE MARAÑÓN VALLEY (PERU) BASED ON FLORISTIC INVENTORIES" (in en). Edinburgh Journal of Botany 73 (1): 95–123. doi:10.1017/S0960428615000281. ISSN 1474-0036. https://journals.rbge.org.uk/ejb/article/view/1597.
- ↑ Anderson, Edward F.; Eggli, Urs (2005) (in de). Das grosse Kakteen-Lexikon. Ulmer. p. 558. ISBN 3-8001-4573-1.
External links
Wikidata ☰ {{{from}}} entry
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